First, if you want to eat authentic northern mutton buns, I suggest going to Yan 'an, Shaanxi. In the local area, there is an old shop named "Longxingfeng", which has a history of nearly 200 years since the Qing Dynasty. The northern mutton bread in soup here is famous for its exquisite materials and delicious taste. In the store, you can see the chefs making steamed buns on the spot, and every link is very particular, and the steaming aroma comes to the nose.
Secondly, if it's not too far away, I suggest going to Xi 'an, Shaanxi to experience a different taste. In Xi 'an Huimin Street, there is a restaurant named "Liu Sanjie". Its northern mutton bread is characterized by its soft gluten and unique taste. In addition, the steamed bread is soaked with delicious mutton, wild vegetables and sauce, and every bite is delicious.
Third, if you like the rich flavor, you might as well try the "Second Boss" northern mutton bread in soup. This shop is a small shop in Weinan city. Although unknown, it attracts many customers with its rich flavor. The soup mixed with mutton, bean paste and pepper exudes a strong spicy taste, which is more creative on the basis of northern mutton paomo.
In short, if you want to eat delicious northern mutton buns, you need to look for and explore more. Every store has its own characteristics. I hope you can find what you like in your attempt.